Implemented selection with Shift in HildonTextView
Implemented selection with Shift in HildonTextView

It uses GDK_SHIFT_MASK to detect the key and lets GtkTextView do the
hard work.

android-808/libhildon,Cordia/libhildon,Cordia/libhildon,Cordia/libhildon,android-808/libhildon,android-808/libhildon